Waterbirds in flight

My hiking group went to the Humboldt Wildlife Refuge Friday. There were a lot of birds in the marsh pools. This is the best I could do zooming and cropping some Tundra Swans that landed. Egrets are often seen there (as well as many other places in this area). It doesn't seem to matter how mediocre the photographer or her camera -- if you capture them at all, they are beautiful in flight.